mb3775pfv Fujitsu Microelectronics, Inc., mb3775pfv Datasheet - Page 22

• Manufacturer Part Number: mb3775pfv
• Description: Switching Regulator Controller
• Manufacturer: Fujitsu Microelectronics, Inc.

22
MB3775
(2) As shown in Figure 37, a resistor (R
advance the phase. The more R
high-frequency range is also increased, which causes instability. Therefore, select the optimum resistance
(see Fig. 38).
60
40
20
0
20
40
10
V
R
C
Smoothing Capacitor
22 F OS-CON
R
R
R
CC
L
P
P
1
2
= 25
= 1.8 k
= 5.6
= 0.1 F
= 470
= 10 V
Fig. 37 - External circuit example 2 to advance the phase
R
1
100
P
Fig. 38 - DC/DC Converter +5 V output
A
is increased, the more the phase is advanced. However, the gain in the
V
V
+ IN
P
) is connected between the FB terminal and C
REF
IN
Frequency f (Hz)
+
R
1k
2
FB
R
C
P
10k
P
V
0
+
45
P
of the error amplifier to
100k
180
90
0
90
180